/* IPD Scientific — mobile-first stylesheet */
:root{
  --ink:#0f1b2d; --ink-2:#3b4a5e; --muted:#667389;
  --line:#e3e8ef; --bg:#fff; --bg-soft:#f5f8fb; --bg-tint:#eef4fb;
  --accent:#1f5fbf; --accent-ink:#17488f; --accent-soft:#e3edfa; --teal:#0f8b8d;
  --radius:14px; --shadow:0 1px 2px rgba(15,27,45,.06),0 8px 24px rgba(15,27,45,.06);
  --max:1120px; --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);font-size:16px;line-height:1.6;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;margin:0 0 .5em;letter-spacing:-.015em}
h1{font-size:clamp(2rem,6.5vw,3.25rem);font-weight:700}
h2{font-size:clamp(1.6rem,4.5vw,2.25rem);font-weight:700}
h3{font-size:1.1rem;font-weight:600}
p{margin:0 0 1em}
figure{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:.75rem}
.lead{font-size:1.08rem;color:var(--ink-2);max-width:42em}
.muted{color:var(--muted);font-size:.92rem}
.centre-note{margin:14px 0 0;color:var(--muted);font-size:.9rem;text-align:center}
section{padding:60px 0;scroll-margin-top:72px}
.soft{background:var(--bg-soft)}
.band-wrap{padding:0 0 60px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:100}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:48px;padding:0 22px;border-radius:999px;font-weight:600;font-size:1rem;border:1.5px solid transparent;cursor:pointer;text-decoration:none!important;transition:background .15s,border-color .15s,transform .05s;font-family:inherit}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn svg{width:18px;height:18px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.topbar{display:none;background:var(--ink);color:#c8d3e2;font-size:.85rem}
.topbar .wrap{display:flex;gap:22px;align-items:center;height:36px}
.topbar a{color:#dce6f3;display:inline-flex;align-items:center;gap:7px}
.topbar a:hover{color:#fff;text-decoration:none}
.topbar svg{width:15px;height:15px;color:#7fb5ff}
.topbar span{margin-left:auto;color:#8fa2ba}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:1.05rem;text-decoration:none!important}
.brand img{width:36px;height:36px;border-radius:9px;object-fit:cover;border:1px solid var(--line);background:#fff}
.brand small{display:block;font-weight:500;font-size:.72rem;color:var(--muted);letter-spacing:.02em;margin-top:-2px}
.nav-links{display:none;gap:22px;align-items:center}
.nav-links a{color:var(--ink-2);font-weight:500;font-size:.95rem}
.nav-links a:hover{color:var(--accent);text-decoration:none}
.nav-cta{display:none}
.menu-btn{width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;display:grid;place-items:center;cursor:pointer}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);transition:transform .2s}
.menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}
.menu-open .menu-btn span{background:transparent}
.menu-open .menu-btn span::before{transform:translateY(6px) rotate(45deg)}
.menu-open .menu-btn span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-menu{display:none;border-top:1px solid var(--line);background:#fff;padding:8px 20px 20px;max-height:calc(100vh - 64px);overflow:auto}
.menu-open .mobile-menu{display:block}
.mobile-menu a{display:block;padding:14px 0;border-bottom:1px solid var(--line);color:var(--ink);font-weight:500;font-size:1.05rem}
.mobile-menu .btn{width:100%;margin-top:16px;border-bottom:0}

/* Hero */
.hero{position:relative;padding:0;background:#0b1a33;overflow:hidden;color:#fff}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.55}
.hero-bg::after{content:"";position:absolute;inset:0;background:
  radial-gradient(120% 90% at 85% 15%,rgba(31,95,191,.45) 0%,rgba(11,26,51,.1) 55%),
  linear-gradient(180deg,rgba(7,17,33,.92) 0%,rgba(7,17,33,.7) 45%,rgba(7,17,33,.95) 100%)}
.hero-inner{position:relative;z-index:2;padding:52px 20px 34px;max-width:var(--max);margin:0 auto}
.hero h1{font-size:clamp(2.1rem,7.4vw,3.9rem);letter-spacing:-.025em;margin-bottom:.4em;color:#fff}
.hero h1 .grad{background:linear-gradient(95deg,#7fb5ff,#5ce1e6);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{color:#c6d4e8;max-width:34em}
.hero .eyebrow{color:#8fc0ff}
.hero-ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero-ctas .btn{flex:1 1 220px}
.hero .btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.34)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;border-color:#fff}
.hero-points{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:10px}
.hero-points li{display:flex;gap:10px;align-items:flex-start;color:#d8e3f2;font-size:.97rem}
.hero-points svg{width:18px;height:18px;flex:none;margin-top:3px;color:#5ce1e6}
.dark-points li{color:var(--ink-2)}
.dark-points svg{color:var(--teal)}
.stats{position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.14)}
.stats .wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:rgba(255,255,255,.12);padding:0}
.stats div{background:#0d1f3b;padding:16px}
.stats b{display:block;font-size:1.4rem;font-weight:700;color:#fff;line-height:1.1}
.stats span{font-size:.8rem;color:#9fb3cd}

/* Inner page hero */
.page-hero{background:linear-gradient(180deg,var(--bg-tint),#fff);padding:48px 0 40px}

/* Cards & grids */
.grid{display:grid;gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card p{color:var(--ink-2);font-size:.97rem}
.card p:last-child{margin-bottom:0}
.icon{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin-bottom:14px}
.icon svg{width:22px;height:22px}
.section-head{margin-bottom:28px}

/* Industry cards */
.ind-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;color:var(--ink);transition:transform .18s,box-shadow .18s,border-color .18s}
.ind-card:hover{text-decoration:none;transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfdcec}
.ind-card p{color:var(--ink-2);font-size:.95rem;margin-bottom:10px}
.ind-card .go{font-weight:600;color:var(--accent);font-size:.92rem}

/* Case studies */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 22px 22px;transition:transform .18s,box-shadow .18s,border-color .18s;overflow:hidden}
.case:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfdcec}
.thumb{display:block;width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--bg-tint);border-radius:10px;margin:0 0 14px;transition:transform .35s}
.case:hover .thumb{transform:scale(1.03)}
.tag{display:inline-block;font-size:.72rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--teal);background:#e6f4f4;border-radius:999px;padding:3px 10px;margin-bottom:10px}
.case dl{margin:0}
.case dt{font-size:.72rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-top:12px}
.case dd{margin:3px 0 0;color:var(--ink-2);font-size:.95rem}
.case .result-line{color:var(--teal);font-weight:600}
.more-projects{margin-top:22px}
.more-projects summary{cursor:pointer;font-weight:600;color:var(--accent);min-height:44px;display:flex;align-items:center;list-style:none}
.more-projects summary::-webkit-details-marker{display:none}
.more-projects summary::after{content:"+";margin-left:8px;font-size:1.2rem}
.more-projects[open] summary::after{content:"–"}
.more-projects ul{margin:8px 0 0;padding-left:1.1em;color:var(--ink-2)}
.more-projects li{margin-bottom:6px;break-inside:avoid}

/* Phases */
.phase .phase-no{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:#fff;background:var(--accent);border-radius:999px;padding:4px 11px;margin-bottom:12px}
.phase .dur{color:var(--muted);font-size:.9rem;font-weight:600;margin-bottom:10px}
.phase ul{margin:0;padding-left:1.1em;color:var(--ink-2);font-size:.95rem}
.phase li{margin-bottom:6px}

/* Sensors */
.sensor-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.sensor{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.sensor img{width:100%;aspect-ratio:1/1;object-fit:cover;background:var(--bg-tint)}
.sensor span{display:block;padding:10px 12px;font-size:.88rem;font-weight:600}

/* Split blocks */
.split{display:grid;gap:24px;align-items:center}
.split img{width:100%;border-radius:12px;border:1px solid var(--line)}

/* About / founder */
.founder{display:grid;gap:22px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}
.founder h3{font-size:1.25rem}
.photo-placeholder{aspect-ratio:1/1;border:2px dashed #c3d2e4;border-radius:16px;display:grid;place-content:center;text-align:center;color:var(--muted);font-weight:600;background:var(--bg-tint);padding:16px}
.photo-placeholder small{font-weight:500;font-size:.8rem}
.founder-points{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:8px}
.founder-points li{display:flex;gap:10px;color:var(--ink-2);font-size:.95rem}
.founder-points svg{width:18px;height:18px;flex:none;margin-top:3px;color:var(--teal)}
.person .role{color:var(--accent);font-weight:600;font-size:.9rem;margin:-4px 0 10px}
.avatar{width:56px;height:56px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:700;font-size:1.1rem;margin-bottom:14px}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.fact{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:12px}
.fact b{display:block;font-size:.74rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.fact span{font-weight:600;font-size:.92rem;word-break:break-word}

/* Quotes */
.quote blockquote{margin:0 0 14px;font-size:1.02rem}
.quote figcaption{font-size:.88rem;color:var(--muted);font-weight:500}

/* Patents */
.patent-box{display:grid;gap:20px;background:var(--ink);color:#fff;border-radius:18px;padding:28px}
.patent-box h2{color:#fff}
.patent-box p{color:#c8d3e2}
.patent-box .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.patent-box .btn-ghost:hover{border-color:#fff}
.patent{border-left:3px solid var(--accent)}
.patent .num{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem;color:var(--muted);margin-bottom:6px}

/* CTA band */
.cta-band{background:linear-gradient(100deg,#133a7d 0%,#1f5fbf 55%,#0f8b8d 140%);color:#fff;border-radius:20px;padding:32px 24px;text-align:center}
.cta-band h2{color:#fff;margin-bottom:.35em}
.cta-band p{color:#dbe7f8;max-width:36em;margin:0 auto 22px}
.cta-band .btn-primary{background:#fff;color:var(--accent-ink)}
.cta-band .btn-primary:hover{background:#eaf1fd}

/* Contact */
.book{display:grid;gap:20px}
.book-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow)}
.book-card > .btn{width:100%}
.contact-list{list-style:none;margin:0;padding:0}
.contact-list li{border-bottom:1px solid var(--line)}
.contact-list li:last-child{border-bottom:0}
.contact-list a{display:flex;gap:14px;align-items:center;padding:14px 0;color:var(--ink);min-height:56px}
.contact-list a:hover{text-decoration:none;color:var(--accent)}
.contact-list svg{width:20px;height:20px;color:var(--accent);flex:none}
.contact-list small{display:block;color:var(--muted);font-size:.8rem}

/* Enquiry form */
.enquiry{display:grid;gap:14px;margin-top:4px}
.enquiry label{display:block;font-size:.85rem;font-weight:600;color:var(--ink-2)}
.enquiry input,.enquiry select,.enquiry textarea{width:100%;margin-top:6px;font:inherit;font-size:1rem;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;min-height:48px}
.enquiry textarea{min-height:92px;resize:vertical}
.enquiry input:focus,.enquiry select:focus,.enquiry textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.enquiry .full{grid-column:1/-1}
.enquiry button{width:100%}
.form-note{color:var(--muted);font-size:.82rem;margin:0}

/* Footer */
footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:40px 0 110px;color:var(--muted);font-size:.92rem}
.foot-grid{display:grid;gap:26px}
.foot-grid b{display:block;color:var(--ink);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.foot-grid a{display:block;color:var(--ink-2);padding:5px 0}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;margin-bottom:10px}
.footer-logo{width:40px;height:40px;border-radius:10px;object-fit:cover;border:1px solid var(--line)}
.foot-base{padding-top:20px;margin-top:10px;border-top:1px solid var(--line)}

/* Mobile action bar */
.action-bar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-template-columns:1fr 1fr 1.6fr;gap:8px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);border-top:1px solid var(--line);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.action-bar .btn{min-height:48px;padding:0 10px;font-size:.95rem}

/* Scroll reveal */
.reveal{opacity:0;transform:translateY(14px)}
.reveal.in{opacity:1;transform:none;transition:opacity .5s ease,transform .5s ease}
@media (prefers-reduced-motion:reduce){.reveal,.reveal.in{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}*{transition:none!important}}

@media (min-width:640px){
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .stats .wrap{grid-template-columns:repeat(4,1fr)}
  .hero-points{grid-template-columns:repeat(3,1fr)}
  .sensor-grid{grid-template-columns:repeat(3,1fr)}
  .more-projects ul{columns:2;column-gap:32px}
  .enquiry{grid-template-columns:1fr 1fr}
  .founder{grid-template-columns:220px 1fr;align-items:start}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .facts{grid-template-columns:repeat(4,1fr)}
}
@media (min-width:960px){
  section{padding:84px 0}
  .band-wrap{padding:0 0 84px}
  .topbar{display:block}
  .nav-links,.nav-cta{display:flex}
  .menu-btn,.mobile-menu,.menu-open .mobile-menu{display:none}
  .hero-inner{padding:88px 20px 56px}
  .hero .lead{font-size:1.18rem}
  .hero-ctas .btn{flex:0 0 auto}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .ind-grid{grid-template-columns:repeat(4,1fr)}
  .sensor-grid{grid-template-columns:repeat(5,1fr)}
  .split{grid-template-columns:1fr 1fr;gap:48px}
  .patent-box{grid-template-columns:1.4fr 1fr;align-items:center;padding:44px}
  .cta-band{padding:52px}
  .book{grid-template-columns:1fr 1fr;align-items:start}
  .foot-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr}
  .action-bar{display:none}
  footer{padding-bottom:40px}
}

/* facts inside a card stay two-up so the text doesn't wrap awkwardly */
@media (min-width:640px){ .card .facts{grid-template-columns:repeat(2,1fr)} }